CollisionTree

[Goodjee]

Hey Guys

I'm trying to add newton to my game but collision trees avoid to do the work they're supposed to do...
i'm dropping spheres but they dont stop at a xz-surface.

Here's some Code

Code: Select all

Local plane:Float[]=[0.0,0.0,0.0,   350.0,0.0,0.0,   350.0,0.0,350.0,   0.0,0.0,350.0]
cityPhysics.collision = NewtonCreateTreeCollision(cityPhysics.world,Null);
NewtonTreeCollisionBeginBuild(cityPhysics.collision);

NewtonTreeCollisionAddFace(cityPhysics.collision, 4, plane, 12, 0)
NewtonTreeCollisionEndBuild(cityPhysics.collision, 0);
NewtonBodySetCollision(cityPhysics.rigidbody,cityPhysics.collision)

hope you can help

[Julio Jerez]

If this 1.53 then collison tree with one face will not work.
For SDK 2.0 thei had being fixed.

if you wnat to state with 1.53, you cna just add another dommy face and it will be fine.
I suggest you download 2.01 because it is much better.

[Goodjee]

its the newest version and it doesnt work with more faces or with triangles instead of quads

[Julio Jerez]

There are two issues.

The first is that function
cityPhysics.collision = NewtonCreateTreeCollision(cityPhysics.world,Null);

do not take and extra parameter in 2.02, you must call it like this:

cityPhysics.collision = NewtonCreateTreeCollision(cityPhysics.world);

The second is the face are single side in Newton, if the face normal point down the object will pass through, could you true inverting the winding like this:

Code: Select all

Local plane:Float[]=[0.0,0.0,0.0, 0.0,0.0,350.0,   350.0,0.0,350.0, 350.0,0.0,0.0];

[Goodjee]

thank you...this would have taken days for me to find out on my own